Cisco ONS 15454 nodes use TCP/IP to communicate with a variety of
devices, such as Cisco Transport Controller (CTC) and Cisco Transport Manager
(CTM). This document summarizes the port number usage for TCP/UDP to create
proper filtering.

Note: The information in this document is subject to change in future
software and hardware releases.

The information in this document is based on these software and
hardware versions:

Cisco ONS 15454.

The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.

The Timing, Communications and Control (TCC), or TCC2 or TCC+ cards
facilitate the TCP/IP connectivity. The types of devices in this list
communicate with the ONS 15454 nodes:

CTC workstations

CTM servers/clients

TL1 devices

DHCP servers

SNMP management station

NTP/SNTP servers

Ports are grouped based on the type of services, and the information
currently available. Port numbers are listed for both ends of the sessions for
TCP and UDP. TCP is implied if UDP is not specified.

When the client port number is a random number, it appears as
any. The port number on ONS 15454 appears as
NE:port number, if the port number is fixed. If a client
device is not specified, it appears as ANY.

When you deploy TCP/IP filtering, you must evaluate the filters in the
lab first to determine whether all necessary services are still
available.

This port is for Common Object Request Broker Architecture (CORBA)
command connection. The default is 57790. You can configure this port to the
Standard IANA IIOP Port (683), or a user-defined constant.